Fix unit test mail issue

Author: sebastianfeldmann

src/Log/Mail.php

@@ -207,8 +207,8 @@ public function onPhpbuEnd(Event\App\End $event)
                 $this->mailer->addAddress($recipient);
             }
 
-            if (!$this->mailer->send()) {
-                throw new Exception($this->mailer->ErrorInfo);
+            if ($this->transportType !== 'null') {
+                $this->sendMail();
             }
         }
     }
@@ -350,6 +350,22 @@ protected function setupSendmailMailer(array $options)
         // nothing to do here
     }
 
+    /**
+     * Send the email
+     *
+     * @throws \phpbu\App\Exception
+     */
+    protected function sendMail()
+    {
+        try {
+            if (!$this->mailer->send()) {
+                throw new Exception($this->mailer->ErrorInfo);
+            }
+        } catch (\Exception $e)  {
+            throw new Exception($e->getMessage());
+        }
+    }
+
     /**
      * Return mail header html
      *